INDEX. 



317 



Resistance: see also Conductivity. 



alloys, low temperature .... 264 

 alternating current, effect of . . . 269 

 electrolytic, see Conductivity, 



glass and porcelain 285 



legal unit of 261 



magnetic field, of bismuth in . . . 306 



metals in ... 306 



nickel in ... . 306 



metals at low temperatures . . . 264 



ohm, various determinations of . .261 



specific: metals 263 



wires 262 



temperature variation . . 262-266, 285 



wire (copper) table, common units . 66 



metric units . . 68 



Rigidity, modulus of 74 



temperature variation . . 74 



Ring correction (magnetization) 288 



Rock-salt, indices of refraction 183 



Rods, demagnetizing factors for 289 



Rotation of polarized light: by solutions . . . 197 



Rotation, magneto-optic: formulae 297 



gases 304 



Kerr's constant . . 305 



liquids 299 



solids 298 



solutions . . . 301-303 



Verdet's constant 297-304 



Rowland's standard wave-lengths 171 



Salts, lowering of freezing-point by 217 



raising " boiling- " " 219 



Saturation, magnetic, for steel 293 



Scales, musical 103 



Screens, color 195-196 



Seconds pendulum 107 



Secondary batteries 253 



Sections of wires 59-66 



Shearing tests of timber 72-73 



Sheet metal, weights of 70 



Silver, electro-chemical equivalent . . . 251, 270 



Silvine, indices of refraction 183 



Sines, natural and logarithmic, circular . . 30-38 

 hyperbolic . 39-40 



Sky-light, comparison with sunlight 179 



Soaring of planes, data for 123 



Solar constant of radiation 179 



energy, data of 179 



wave-lengths, Rowland's 171 



Solids: compressibility 76, 83 



densities 85-89 



dielectric constant 283 



electrical resistance 261-269 



hardness 76 



indices of refraction 183-187 



magneto-optic rotation by 298 



thermal conductivity 199 



expansion 222-224 



Solutions: boiling-point, raising by sjilts in . . 219 

 boiling-points of aqueous .... 219 



conductivity, thermal 200 



electrolytic . . 272-278 



densities of aqueous 92-93 



diffusion of aqueous 136 



freezing-points, lowering by salt . .217 

 of aqueous .... 217 



indices of refraction 188 



magneto-optic rotation of . . 301-303 

 potential (contact) differences . 254-257 



specific heats 230-231 



surface tensions 142 



viscosities 129-133 



Sound, velocity of, in solids loi 



liquids and gases . . . 102 



Sparking potentials 248-250 



Specific gravity, see Density. 



heat of air 232 



elements 228 



gases 232 



iron at high temperatures . . 308 



liquids 230 



mercury 229 



minerals and rocks 231 



solids 230 



^ vapors 232 



water 229 



" Specific heat of electricity " 258 



Specific inductive capacity: gases . . . 279-280 

 liquids . . . 280-282 



solids 283 



Specific molecular conductivities .... 373-274 



Specific resistance 262-263 



viscosity: gases and vapors . . . i34-i3S 

 liquids and oils . . . 126-128 



solutions 129-133 



Spectra: elements, brighter lines 170 



iron, Fabry-Buisson 170 



Kayser 174 



solar, Fraunhofer lines 176 



Rowland's measures . . . .171 



Squares, least, tables 47-49 



Standard cells 251-253 



wave-lengths: Fabry-Buisson . . . 170 



Kayser 174 



Rowland 171 



Standards, photometric 177 



Steam tables: metric units 241 



common " 242 



.Steel: magnetic properties: hysteresis 291, 294-296 



permeabilities 286-294 



Stefan- Boltzmann radiation formula .... 238 



Stone: strength of 71 



thermal conductivity 199 



Storage batteries 253 



Strength of materials: bricks 71 



concrete 71 



metals 71 



stones 71 



timber, woods . . . 72-73 



Sun: constant of radiation 179 



disk; distribution of intensity . . . .179 



light; ratio to sky-light I79 



parallax 109 



radiation 179 



spectrum 171, 179 



temperature I79 



Surface tension 142-143 



Susceptibility, magnetic, liquids and gases . . 30S 

 Sylvine. refractive indices 183 



Taylor's series . . la 



Temperature, critical, for gases 221 



resistances for low 264 



sun's 179 



Tensile strengths 71-73 



Tension, surface 142-143 



vapor, see Vapor pressure. 



Terrestrisd magnetism: agonic line us 



declination, secular change no 



dip 112 



secular change . . .112 



horizontal intensity . . .113 



secular change 1 13 



inclination 112 



secular change . 112 



total intensity 114 



secular change 114 



Thermal conductivities : gases 200 



liquids 200 



salt solutions .... 200 



solids 199 



water 200 



Thermal expansion: cubical: crystsils .... 224 



gases .... 226 



liquids .... 225 



solids .... 224 



linear: elements .... 222 



various .... 223 



Thermal unit, dynamical equivalent .... 227 



Thermo-electricity 258-260 



Peltier effect .... 258, 260 



Thermo-magnetic effects 307 



Thermometer: air-i6, o* to 300° C 234 



59, 100° to 200° C . . . . 234 



high-temperature-S9 . . . 235 



hydrogen- 1 6, 0° to 100° C . . . 233 



16, 59. -5° to -35° C . 233 



59. 0° to 100° C . . . 233 



various 235 



Thermometer stem correction 236-237 



Thomson thermo-electric effect 258 



Timber, strength of 72-73 



Time, sidereal, solar 108 



Transformer-iron, permeability of . . . 286-287 



steels, energy losses in . . , 294, 296 



Transmissibility to radiation: atmospheric . . 179 



crystals . . . .194 



glass 193 



Trigonometric functions: arguments (° ') • • • 30 



(radians) . 35 



United States weights and measures, conversion 

 to metric units 5-^ 



